Drank is the past tense of the verb “to drink,” which means to swallow liquid. If you're thirsty now, you drink water. Yesterday when you were thirsty, you drank water.

You might say “I drank three glasses of lemonade at lunch” or “She drank her milk before going to bed.” Animals drink too: a dog drank from its water bowl, or wild horses drank from a stream.

The word works for any liquid: juice, broth, tea, or even medicine. “The sick child drank the cherry-flavored cough syrup” tells you the action already happened.

Sometimes people mistakenly say “I drunk my juice” when they mean “I drank my juice.” The word drunk is different: it's used with helping verbs like “have” or “had,” as in “I have drunk all my juice.” But when you're talking about something that simply happened in the past, drank is the right choice.